chore: update alpha branch on release

Author: jim80net

.github/workflows/release-on-merge.yml

@@ -36,3 +36,10 @@ jobs:
         run: "git push https://x-access-token:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git HEAD:refs/heads/v${{steps.semantic.outputs.new_release_major_version}}"
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: Reset alpha branch
+        if: |
+          steps.semantic.outputs.new_release_published == 'true' &&
+          steps.semantic.outputs.new_release_channel == 'undefined'
+        run: "git push --force https://x-access-token:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git HEAD:refs/heads/alpha
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}